Selected financial information for Raider Power Manufacturing is presented in the following table (000s omitted). Sales revenue $4200 Purchases of direct materials $490 Direct labor $500 Manufacturing overhead $640 Operating expenses $700 Beginning raw materials inventory $270 Ending raw materials inventory $200 Beginning work in process inventory $360 Ending work in process inventory $410 Beginning finished goods inventory Ending finished goods inventory What was operating income? $320 $260 $2910 $4200 $1790 $3500